Machine-brake.



H. S..GERMON D,JR. MACHINE BRAKE. APPLYICATRON FILED OCT. 4. 191a. Patented May 29, 1917-.

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H. S. GERMOND, JR.

MACHINE BRAKE.

APPLICATION F |LED OCT. 4' l9l3- Emmy 29f1917.

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1 [DION 0E NEW JERSEY.

2' OF JERSEY CITY, JERSEY, A

MACHINE-BRAKE.

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To all whom it may concern: 7

Be it known that I, HENRY SHELDEN GERMoND, J r., a citizen of the United States of America, residing at Bayonne, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Machine-Brakes, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to improvements in portable elevators (sometimes called tiering machines) and particularly to improve ments in the hand-hoist or hand-winch with which such machines are commonly provided; and an object of this invention is to provide a hand-operated hoisting mechanism which will safeguard the operator from injury due to the backward or'retrograde rotation of the removable crank with which the windlam-shaft is turned. Another object of this invention is to provide a manually-operated hoisting mechanim i which will with entire safety to the operator permit the rapid reversalof the direction of movement of the load-carrying platform. A" further object of this invention is to provide a manually-operated hoisting mechanism which will be simple in construction, comparatively cheap in manufacture and efiicient, handy and durable in operation and use and the cost of upkeep of which will be relatively small.

In the drawingsillustrating the principle of this invention and the best mode now known to me of applying that principle, Figure 1 is a side elevation of a tiering machine embodying this invention; Fig; 2 is a section on the line 2-2 of Fig. 1; ig. 3 is a view of the hoisting mechanism taken in the direction of the arrow A in Fig. 1; Fig. l is a detail showing the brake-lever in perspective; and Fi s. 5 and 6 are detail views showing modifie forms of the wiperplate and crank, respectively.

The base a is supported on the casterwheel I) and the other two wheels 0 and in turn carries a pair of guide-standards d between which the load-carrying platform 6 is aranged to slide up and down. To the load-carrying platform 6 is attached one end of a winding cable f which passes over the pulley g and the other end of which is attached to the Windlass-drum h mounted upon a Windlass-drum shaft 5, to which 1s Specification of Letters Patent.

Application filed October a, 19153.

Patented May 29, 1917.

Serial No. 798,390.

gear 9' is rotated. In order to rotate the spur-gear j, a train of gearing is, m, n, is provided. The uppermost pinlon n is mounted upon the winding-shaft o and meshes with the intermediate gear m, upon the same shaft p with which there is mounted fast a pinion is which meshes with the spur-gear j. The shaft p may be used as a winding-shaft where the load is relatively light or speed in raising the load is a matter of importance or the distance the platform is to travel is relatively short. In order to prevent backward rotation of the upper winding-shaft 0 during the ascending movement of the load-carrying platform 6, there is provided a brake mechanism which is substantially the same as that shown and described in an application filed by William Edward Boehck, April 19, 1913, Serial No. 762,236. This brake mechanism may be briefly described as follows: Upon the winding-shaft 0 there is idly or loosely mounted a brake-disk 9 formed witha recess r the annular Wall of which is provided with internal ratchet-teeth s with which is adapted to engage the toe of a" spring-controlled pawl t pivotally mounted upon the pawl-carrier a which is fast upon the winding-shaft 0. a From the cross-beam 4) there depends a pair of shaft-hangers w, in which is rotatably mounted a cam-shaft w. This cam-shaft a: passes through holes in the upper ends of the brake-jaws 3 which are arranged to clasp tightly the periphery of the brake-disk g and are thrown into releasing position by a coil-spring 2 mounted upon the camshaft w, when the same is turned to permit the spring 2 to expand. Upon the camshaft a there is formed a pair of cams 2; and the upper ends of the brake-jaws y' are provided with lugs 3 cams 2 may be turned so as to force the upper ends of the brake-jaws y toward each other, against the tension of the coil-sprung ratchet-teeth s. The load-carrying platform ell e being released, backward rotation of the winding-shaft 0 is prevented by the engagement of the toe of the pawl 16 with-the internal ratchet-teeth 8 of the; brake-disk g. which is clasped firmly between the brake jaws y,- and, since this brake-disk g is held last by the latter, backward rotation of the winding -shaft 0 is prevented. However, when it is desired to permit backward rota tion of the winding shaft 0, the camshaft e isturned into the position shown in Fig. 3, whereby the c 2 are thrown into a position permitting the coil-spring 2 to force the upper ends of the brake-jaws y spent thereby releasino the brake-disk g from grip thereof. Since the idly-mounted brakedisk Q will now be free to rotate upon the windin shaft 0, the weight of the load-car rying p atforrn e will tend to cause the retrograde movement of the winding-shaft 0 and the brake-disk 9 locked thereto by the pawl t andpawl-carrier u; and the platform will be free to descend.

In order to turn the cam-shaft w, the following mechanism is provided: Near the base of the upright 4 there is tulcrumed a brake-lever 5 comprising a pair of arms 6 the upper ends of which are joined by a hendie 7. About midway of the arms 6 there is provided a pair of wiper plates or guard plates 8, each of which is formed with an aperture 9. Through the upper aperture 9 there projects the squared end 0" of the winding-shaft o and through the lower a orture 9 there projects the squared end 10 oil the lower winding-shaft p. The squared endsy o, p, of the winding-shafts 0, p, are the same in shape and are so shaped as to engage snugly in the socket ie of the cranlr 11. Upon one end of the cam-shaft a: there is mounted a rocker-arm 12 the upper end of which is connected by a link 13 with one of the brake-lever arrest. When the brake-' lever 5 isin the full-line 'osition of Fig. l,

the rocker-arm 12 is so t rown; as to causethe brake-disk 9' to be held firmly against rotationhy the'hrakejaws y. 'en, how ever, it is desired to reverse the. direction 0:? movement or the load-carrying platform and to allow the same to descend, the operator grasps the handle 7 and pulls the broke-lo to wind up the cable f and raise the driving shaft therefor; means for holdl mes es ver 5 outward and away from the frame of the tiering-machine. During this outward. movement of the brake-lever 5, the guard plates 8 travel outwardly over the squared ends 0, p, of the winding-shafts 0, p, and should the workman have been so careless to have left upon either of these shafts his crank 11, the wiper-plates or guard-plates 8 will wipe or knock the some from oil the end of the windin -shaft (see dotted lines in Fig. l). The cams 2 are so positioned that the coil-spring 2 will not be permitted to force the brakeaws 3 into releasing posi tion until the wiper-plates 8 have traveled over the squared ends 0', p, or the wind lug-shafts 0, p, suficiently to throw oft the crank ll, it the same has been left on shaft by the workman. In this way. insured that the workman will he saved from injury by reason or backward rotation. gr of the crank, when the brake is released end the load-carrying platform a is ellowed to descend. i

In Figs. 5 and 6 shown, respectively modified form of wiper-plate 8 and modilied form of crank ll. In this the wiper-plate 8' is formedwith a semicircular lip 14: and the cranlr ll is formed with flange 15. When the cranlr Jill is wiped free of the winding-shalt e (or p} and by disconnected therefrom, the flange 1-5 the crank will, when the letter drops engage with the semicircular lip, 14, who the cronlr will be caught and held .-L om dropping on the floor and in n position where it may be readily seized and comes l with the shaft 0 (or go), when it is dos form 6 again. 1 claim: 1. A hoisting mechanism comprising said shaft against retrograde rotation; and mechanism which is mounted free to slip outwardly alon said shaft and wipe therefrom articles slldably mounted thereon end which when slipped outwardly along shalt throws said means into releasing peel tion.

2. A hoisting mechanism comprising driving shaft terelor; means for hold said shaft against retrograde rotetion, device for operating said shaft and elidehlv mounted thereon; and mechanism which mounted free to slip outwardly along said shaft and wipe said device therefrom which when slipped outwardly along; said shaft throws said device therefrom and sold means into releasing position.

llOlStlIlf mechanism comprising a driving shalt therefor; an operatino device for turning the latter and removafily eonnected therewith; a brake for holding shaft against retrograde movement; I, brake-controlling mechanism provided means for disconnecting said shaft from its operating device.

4. A hoisting mechanism comprising a driving shaft therefor; locking mechanism which prevents the retrograde movement of said shaft; and means which Wipe said shaft clear and release said locking mecha nism.

5. A hoisting mechanism comprising a driving shaft therefor; an operating. device for turning the latter and removably connected therewith; a ,brake for holding said shaft against retrograde movement; and a brake-lever provided with a wiper for disconnecting said shaft from its operating device.

6. A hoisting mechanism comprising a driving shaft therefor; an operatin device for turning the latter and remove 1y connected therewith; locking mechanism for holding said shaft againstretrograde movement; means which release said locking mechanism and disconnect said shaft and its operating device; and retaining means which engage said operating device after its disconnection from said driving shaft.

Signed at the borough of Manhattan, city, county and State of New York, this second day of October, 1913, in the presence of the two undersigned witnesses.

HENRY SHELDEN GERMOND, JR. Witnesses:

M. E. WOARDELL; JAMES HAMILTON. 

